Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26cf910504dba4c…

MALICIOUS

PDF

33.4 KB Created: 2020-08-28 09:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cc164c40d46a32987aaa81d470814b1 SHA-1: f53be3663f4e810c047fb14d017904eeb5a7c89d SHA-256: a26cf910504dba4c9ed54ce15b37ae298a38304d6edd1378630609e3256e3bbd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded URLs, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a "solutions manual", which is likely a pretext for delivering malicious content or redirecting the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=rocket+propulsion+elements+8th+edition+solutions+manual In PDF document text
    • http://bunifafe.burford12.co.uk/uploads/1/3/1/3/131380942/302be91ee1bfe.pdfIn PDF document text
    • http://wakero.pathlightministries.com/uploads/1/3/1/6/131607254/80276.pdfIn PDF document text
    • http://files.simpleessentialsforlife.com/uploads/1/3/0/7/130739415/sezugarikirema.pdfIn PDF document text
    • http://files.bullitteastarchery.com/uploads/1/3/2/6/132681384/1214900.pdfIn PDF document text
    • http://zezuda.lyndsdesignhouse.com/uploads/1/3/0/7/130775997/pebade-babigeb-todoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9114/9207/files/abominable_movie_tamilrockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/41894285270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/rolimomimeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/bazes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/pifaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1195/5098/files/geometric_progression_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/armory_v._delamirie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3570/2949/files/dubepizewubexal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/physics_volume_2_halliday_resnick_krane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/xugekefuvap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2087/6962/files/penogabixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1354/6657/files/visalobol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/2010_chevy_impala_car_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000467f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x467F 5576 bytes
SHA-256: 9e9f2021f10f056c9a5cd0a218977966b7318d024fe198f6ac48ac85a530f1e2
font_01_sfnt_off0000593c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593C 9032 bytes
SHA-256: 264d99a4c86cbc29e6d91323dab754217fbfcf3eeb99c5c3bde5e852f0f99d16

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